diff --git a/docs/helpers.md b/docs/helpers.md
index 450ddb29..b047d367 100644
--- a/docs/helpers.md
+++ b/docs/helpers.md
@@ -88,6 +88,7 @@ You will get `link`html. Do not worry, you can still set ti
+
```
@@ -99,4 +100,46 @@ You will get `link`html. Do not worry, you can still set ti
```md
### 你好，世界！ :id=hello-world
-```
\ No newline at end of file
+```
+
+## Markdown in html tag
+
+You need to insert a space between the html and markdown content.
+This is useful for rendering markdown content in the details element.
+
+```markdown
+
+Self-assessment (Click to expand)
+
+- Abc
+- Abc
+
+
+```
+
+
+Self-assessment (Click to expand)
+
+- Abc
+- Abc
+
+
+
+Or markdown content can be wrapped in html tag.
+
+```markdown
+
+
+- listitem
+- listitem
+- listitem
+
+
+```
+
+
+
+- Abc
+- Abc
+
+